Restore the structural foundation and internal protection of your indoor unit with the Samsung Air Conditioner Back Cover Assembly DB90-11142B. This critical component, often called the rear chassis or base pan, serves as the main structural skeleton that mounts directly to the wall bracket. It is designed to securely hold the evaporator coil, blower motor, and drain pan in precise alignment. A cracked or warped back cover can lead to improper drainage, persistent water leaks, or excessive mechanical vibration and noise during operation.

The DB90-11142B is manufactured from high-density, impact-resistant polymer that is engineered to handle the weight of the internal components and the thermal stress of constant cooling cycles. Its precision-molded architecture includes integrated drainage channels and mounting points for the electrical control box, ensuring that all parts remain seated in their factory-standard positions for optimal airflow and efficiency.

Installation / Replacement Instructions

1. Safety First: Turn off the air conditioner and completely disconnect the power at the main circuit breaker.
2. Complete Disassembly: Because the back cover is the core structural piece, replacement requires a full teardown. You must remove the front panel, intake grille, horizontal louvers, and the entire front housing.
3. Remove Internal Components: Carefully disconnect and remove the electrical control box, the fan motor, and the cross-flow blower wheel.
4. Support the Coil: The evaporator coil must be unscrewed from the chassis. This step usually requires two people—one to support the weight of the coil and another to swap the back cover—to ensure the copper refrigerant lines do not kink or leak.
5. Swap the Chassis: Unhook the old back cover from the wall mounting plate and slide it out from behind the coil. Position the new DB90-11142B onto the wall plate, ensuring it is level and clicks securely into the mounting hooks.
6. Reinstall Components: Place the evaporator coil into the new chassis and secure it. Reinstall the blower motor, fan wheel, and drain pan, followed by the electrical control box.
7. Reassemble and Test: Replace the outer housing and front panel. Restore power and run the unit to ensure it is level, drains water correctly into the pipe, and operates without any internal rattling.

Compatible with select Samsung split-system indoor units, this OEM-quality back cover assembly provides the stable foundation necessary for long-term system reliability and quiet performance.

Key Features
AC Back Cover Assembly - Part number DB90-11142B
Structural Chassis - Provides the primary mounting frame for all internal components
Integrated Drainage Channels - Ensures proper condensation flow to prevent indoor leaks
High-Strength Polymer - Resistant to thermal expansion and structural sagging
Compatible with Select Samsung Models - Precision-matched for a factory-standard fit
OEM-Quality Part - Restores original structural integrity and quiet operation standards